TEKTON 1358 3/8-Inch Drive Ball Hex Bit Socket Set, SAE, 7-Piece Drop forged chrome vanadium steel sockets^ Precision-machined chrome vanadium steel bits^ Corrosion-resistant chrome-plated (sockets) and brass-coated finishes (bits)^ Notches in sockets lock onto ratchets and extensions^ Ball end allows up to 25-degree entry angle for extra clearance in tight spots Drop Forged Chrome Vanadium Steel Sockets Precision-Machined Chrome Vanadium Steel Bits Durable Chrome Plated Finish on Sockets and Brass-Coated Finish on Bits Resist Corrosion Notches in Sockets Lock on to Ratchets and Extensions Lifetime Guarantee